Clamp



FIG. 1 is a front view of a clamp of the claimed design.

FIG. 2 is a rear view of the clamp of FIG. 1.

FIG. 3 is a right side of the clamp of FIG. 1.

FIG. 4 is a left side view of the clamp of FIG. 1.

FIG. 5 is a bottom view of the clamp of FIG. 1.

FIG. 6 is a top view of the clamp of FIG. 1; and,

FIG. 7 is a perspective view of the clamp of FIG. 1. 

I claim the ornamental design for a clamp, as shown and described. 